Multiplace datastore works in studio but not in roblox player?

I want to make a datastore that is accessible through multiplie places within the same game/universe and when I change a leaderstats value it gets saved and is accessible through the main place.

The code I made seems to work fine in the studio (when I press stop it saves and is accessible in the main place) but when I try to save it in the Roblox Player it doesnt save and isnt accessible in the main place.

Here is the datastore server script, placed in ServerScriptStorage, in both the main place and the second place (Ill call the main place "place A" and the other "place B")

local datastoreservice = game:GetService("DataStoreService")
local datastorage = datastoreservice:GetDataStore("datastorage")
print("Variables loaded")

local currentSession = {}

local function Load(player)
	local leaderstats = Instance.new("Folder")
	leaderstats.Name = "leaderstats"
	leaderstats.Parent = player
	
	local Nights = Instance.new("IntValue")
	Nights.Name = "Nights"
	Nights.Parent = leaderstats
	
	print("Leaderstats created")
	
	local data
	local success, errormessage = pcall(function()
		data = datastorage:GetAsync(player.UserId)
	end)
	print("Data load happened")
	
	if success then 
		print("Data loaded") 
		if data then
			player.leaderstats.Nights.Value = data
			print(Nights.Value)
		end
	else
		warn("Error happened while loading data: "..errormessage)
	end
end

local function Save(player)
	for i, player in pairs(game:GetService("Players"):GetPlayers()) do
		local success, errormessage = pcall(function()
			datastorage:SetAsync(player.UserId, player.leaderstats.Nights.Value)        
		end)    
		
		if success then
			print("Data saved")
		else
			warn("Error happened while saving data: "..errormessage)
		end     
	end
end

game.Players.PlayerAdded:Connect(Load)
game:BindToClose(Save)

In "place B", when I change the Nights value with a click detector, it saves when im in Roblox Studio (change the value in place B, stop play testing in place B, start play testing in place A and print the value, which works), but it doesnt work when I play in Roblox Player.